2nd - getAbsolutePath(...) gets you the comlete filename incl. path...
3rd - I think you want to scan a folder and add all mp3 files to a list box...
If so, all previous hints are pretty helpless...
Well, you can get the path with getAbsolutePath(...), then you can use the windows api to scan this path...
check the MSDN for FindFirstFile and FindNextFile
